Senior Network Engineer

About Metron Metron is an employee-owned company dedicated to delivering innovative solutions for the most challenging national security problems. For over 40 years, our principled approach to problem-solving has yielded creative solutions at the intersection of advanced mathematics, computer science, physics, and engineering. Our people are leaders in their technical fields and are passionate about solving challenging problems. We look for individuals who share this same passion and can apply their experience in real-world settings.    Job Description:   Our Reston, VA offices is seeking a Senior Network Engineer to support enterprise network operations, secure infrastructure, campus connectivity, and hands-on implementation across corporate and secure environments.  This is an execution-focused senior technical role. The Senior Network Engineer will configure, troubleshoot, maintain, document, and improve network systems while working closely with network architecture, systems engineering, cybersecurity, vendors, and program teams.  The ideal candidate is a hands-on senior network engineer with strong Cisco experience, disciplined change-management habits, and the ability to troubleshoot complex network, VPN, access-control, and secure-environment issues.  Occasional after-hours/weekend maintenance and emergency response required.  Key Responsibilities:  Network Operations & Implementation  Configure, maintain, and troubleshoot enterprise LAN, WAN, wireless, VPN, firewall, DNS, and secure network infrastructure.  Execute network changes, switch cutovers, routing updates, firewall/security changes, and connectivity improvements.  Support campus, data center, colocation, carrier, ISP, and secure-environment network operations.  Cisco, VPN & Secure Network Support  Administer Cisco switching, wireless, security, and related enterprise networking platforms.  Troubleshoot site-to-site VPNs, routing issues, latency, packet loss, DNS behavior, firewall behavior, and service-connectivity problems.  Support network access-control workflows, including Cisco ISE, TACACS+, RADIUS, and device-administration policies.  Documentation, Change Management & Escalation  Coordinate Cisco TAC, carrier, ISP, and vendor support cases through resolution.  Follow formal change-management practices, including implementation plans, test plans, risk analysis, backout plans, and maintenance-window coordination.  Maintain accurate network diagrams, change records, implementation notes, operational runbooks, and troubleshooting documentation.  Required Qualifications:  Able to work on-site in Reston, VA   Eligible to obtain and maintain a U.S. security clearance  Willing and able to work in classified, secure, or compliance-bounded environments  Able to support occasional after-hours and weekend maintenance or emergency response  7+ years of hands-on enterprise networking experience  5+ years supporting Cisco enterprise networking platforms  Experience with switching, routing, VLANs, wireless, VPNs, DNS, firewalls, and network security operations  Experience troubleshooting site-to-site VPNs, routing, latency, packet loss, DNS, and service-availability issues  Experience supporting secure, classified, regulated, government, defense, or security-controlled infrastructure  Experience following formal change-management, testing, backout, and documentation practices  Ability to coordinate across network, systems, cybersecurity, helpdesk, vendor, and program teams  Preferred Qualifications:  Active U.S. security clearance  Experience with Cisco ISE, TACACS+, RADIUS, or network access-control policy administration  Experience with TACLANE, encrypted transport, secure enclave networking, or air-gapped environments  Experience with Cisco firewall/security platforms or enterprise firewall policy troubleshooting  Experience with Active Directory, Entra ID, ADFS, SSO, claims, UPN/email hygiene, or ServiceNow identity integrations  Working familiarity with virtualization or platform environments such as VMware, Nutanix, Hyper-V, Linux, storage, or backup systems  Experience in defense contracting, government programs, CMMC, NIST 800-171, or other compliance-driven environment Position Location: Reston, VA (the selected individual will be expected to work onsite in the Reston, VA office)  Perks and Benefits  Medical, Dental and Vision Insurance   Accompanying FSA and HSA options   Additional Voluntary Benefits    Paid Time Off    9 Observed Holidays and 2 Floating Holidays    Paid Parental Leave   Military Leave  Tuition Reimbursement  Professional Development Reimbursement   Annual Salary Reviews    Profit Sharing    401(k) Traditional and Roth Options    Gym and Fitness Reimbursement    Employee Assistance Program    Employee Referral Program     Metron is an Equal Employment Opportunity (EEO) employer. It is the policy of the company to provide equal employment opportunities to all qualified applicants without regard to race, color, religious, sex, sexual orientation, gender identity, national origin, age, protected veteran or disabled status, or genetic information. VEVRAA Federal Contractor